Gather some fabric scraps and print or cut a circular piece of paper to use as a pattern.
(I used a small round sticker as a pattern and was able to cut about 6 circles before it got too linty from the fabrics I used.)

Pin or stick your pattern onto the fabric scraps, cutting at least four circles. If you're using thick materials like I did, cut four for the body of the flower. If you're using thinner materials like silks, satins, and quilter's cottons, you may want to cut as many as 8 circles for the flower's body.
(I cut five, and cut the fifth one in half to use as the leaf.)

Fold the first circle in half and then in half again. If you like the way the fabric is showing, sew the corner tight to keep the fabric's shape.
Repeat for any circle you want to use in the flower

Sew all of the corners of the fabric circles together so that you now have a 3D circular flower. Sew on a leaf to the bottom if desired.

Optional: Sew your cool new scrap flower to a headband, a pin, or a hair clip and wear it how you want!
Alternately, you can make a bunch and use them to make a corsage, a bib necklace, or even a bouquet. :)